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首页> 外文会议>Scientific Assembly of the International Association of Geodesy >No relative movements between south american and scotia plates in Tierra del Fuego
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No relative movements between south american and scotia plates in Tierra del Fuego

机译：南美洲和斯科舍板块在德尔德拉·冯戈之间没有相对运动

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In December, 1993, a twenty points precise GPS network for cartographicand geodetic purposes was first established in the argentine portion of the Tierra del Fuego Island. The northern part of the network (15 points) is placed on the Southamerican plate (SAM), three points are situated on the Scotia plate and two points are located near the main fault. Redundant baselines were measured in such a way that each point is directly related to at least three neighbor points. During december, 1994 and December, 1995, the network was partially remeasured (12 common points) to detect tectonic movements between SAM and Scotia plates. TRIMBLE 4000 SSE receivers were used during the 1993 campaign, and Ashtech Z12 receivers were used in 1994 and 1995 campaigns. Each time, the individual baselines were processed using the GPSurvey software, and the Trimnet program was used to compensate the redundant baselines. Precise IGS orbits were used in all cases. The estimated accuracy of each individual network was 1 cm in latitude and longitude and 2 cm in ellipsoidal height. The repetitivity of the coordinates between the results of the different campaigns, after a Helmert transformation is better than 1 cm in latitude and longitude and about 2 cm in ellipsoidal height. Due to the relatively small distances between the extremes of the network (about 150 km), the spatial coordinates were transformed to plane Gauss Kruger coordinates and a two dimension transformation was performed (a scale factor, one rotation angle and X, Y origin offsets). The repetitivity of the plane coordinates is better than 1 cm. In conclusion, no movements were detected in this region during the last two years, to this level of accuracy.
机译：1993年12月，首先在Tierra del Fuego岛的阿根廷部分建立了一个二十点的制图和大地测量目的。网络北部（15分）位于南方的板（SAM）上，位于斯科略板上，三个点位于主故障附近。以这样的方式测量冗余基线，即每个点与至少三个邻点直接相关。 1994年12月和1995年12月期间，该网络被部分地重新测量（12个共同点），以检测SAM和斯科罗斯板之间的构造运动。 Trimble 4000 SSE接收器在1993年的运动期间使用，Ashtech Z12接收器于1994年和1995年的活动使用。每次，使用GPSurvey软件处理各个基线，使用TrimNet程序来补偿冗余基线。在所有情况下使用精确的Igs轨道。每个网络的估计准确性在纬度和经度和椭圆形高度2厘米处为1厘米。在不同的运动结果之间的坐标之间的重复性，在蠕变转换之后的纬度和经度优于1厘米，椭圆形高度约为2厘米。由于网络的极端之间的距离相对较小（约150 km），将空间坐标转换为平面高斯克鲁格坐标，并且执行了两个维度变换（比例因子，一个旋转角度和x，y原始偏移） 。平面坐标的重复性优于1厘米。总之，在过去两年中，在该地区未检测到该地区的动作，以这种准确性水平。

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